Grinding-machine.



No. 727,98l`

\ PATENTED MAYlZ, 1908.v

' 'W.F.LoMAsNBY.

GRINDING MACHINE. APPLIUATION FILED JAN. e, 190s.

s SHEETS-SHEET 1.

NO MODEL.

,FQ-i1 ,2

WITNEEEE No. 727,981. PATENTED MAY 12; 1903.

W.F..L0MASNEY.

GRINDING MACHINE..

`APPLIGATION FILED JANVB, 190.3.

No MODEL. Z a sHEBTs-sHBBT'a.

` Fla WITNEEEEE UNETE STATES'. L

atented May 12, 1903.

ATENT FFCE WILLIAM F. LOMAsNEY, OE sonENEorADv, NEW YORK, AssIeNOR OE TWO- THIRDS To' CLARENCE HEATLY AND JAMES R. HOWGATE, OE sOHENEo'- TADY, NEW YORK.

MACHINE.

' sPEcIFioATIoM forming part of Leners retest Np. 727,981, dated May 12, 1903'. Application ined January 6.1903. senti No. 138,000.' (N'model.)

To LLZZ whom t may concern: A

Beit known that 1, WILLIAM F. LoMAsNEv, a citizen of the United States, residing at Schenectady, county of Schenectady, and State of New York, have invented certain4 new and useful Improvements in Grinding- Machines, of which the following is a specification.

The invention relates to such improveio ments; and it consists of the novel construction and combination of parts hereinafter described and subsequently claimed.V

Reference may be had to the accompanying drawings, and the reference, characters i5 marked thereon, which form a part of this specification. Similar characters refer to similarparts in the several figures.

Figure 1 of the drawings is a top plan View zo of myimproved grinding-machine. Fig. 2 is a central vertical longitudinal section th rough the grinding-tool and its supporting and operating mechanism, taken n the broken line 2 2 in Fig. 1. Fig. 3 is a verticalcross-section taken On the broken line 3 3 in Fig. 2. Fig. 4 is a View, partly in side elevation and partly in vertical section, taken on the broken line 4 4 in Fig. 1, of the machine shown therein. Fig. 5 is a view in side elevation of the o upper end of one form of Work-holder, show-V ing a milling-cutter supported'thereupon and held in a selected position of rotative adjustment by means of a catch-bolt mounted upon the Work-holder. Fig. Gis a top'plan View of` the catch-bolt and a portion of the Work engaged thereby shown in Fig. 5. Fig. 7 is a horizontal longitudinal section of the catchbolt and the housing therefor. Fig. Sis a Vertical section taken On the broken line 8 8 in 4o Fig. 4. Fig. 9 is aview, partly in sidev elevation and partly in vertical section,of the grind-V ing-tool, a portion of the turret, the oscillatory head-block mounted thereupon, and a different form of Work-holder from that shown in the preceding figures. Fig. 10 is a top plan view of the same. Fig. 11 is a horizontal section taken on the broken line 1]. 11 in Fig. 9. Fig. 12 is a'vertical cross-section taken on the broken line 12 12 in Fig. 9. Fig. 13 is a vertical cross-section taken on the broken line 13 13 in Fig. 10.

tool in different posit-ions necessary to secure the desired action of the tool thereupon.

.riage 10, which is capable of slide movements eratingspindle 5. imparted to the carriage in any known .man-

The invention relates more particularly to' machines for dressing or sharpening milling- -f cuttersand work ot' a like nature by subject# ing the saine to the action of an emery-Wheel or other tool adapted for the work under treat.-

' ment.

The principal object of theinvention is to facilitate the presentation of the work to the Other objects ofthe invention will appear in connection withY the following description.

vThe invention is particularly adapted for machines for sharpening or dressing the teeth of milling-cutters of various kinds and the drawings illustratethe invention applied to Ya machine of this kind.

'ably moved toward and from the tool by means of the nut 4,' ixedto said bed and t- 8o ting vthe vertical screw-spindle 5, rotatively mounted in bearings onthe frame of the machine and'provided with a bevel-gear connection 6 with the horizontal shaft 7, having fixed thereon the hand-wheel 8, whereby said shaft lcan be rotated, all in the usual manner. The

bed may be adjustably moved toward and from the tool in any otherknown manner. The bed isprovided with a slideway 9 for thecar- 9o along the bed toward andfrom the bed-op- Slide movements can be ner, as by the screw-spindle 11, rotatory in a bearing 12 on the bed and held' thereby 95 against longitudinal movement, and a nut 13, fixed to said carriage and fitting said spindle- The carriage may be locked in adjusted pO- sition by meansy of the yoke 14, which embraces the spindle l1 and is caused to bind roo thereupon by engagement with the hub of the hand-wheel 15, having a screw connection form.

with the spindle 16, projecting from the nut 13. The carriage is provided with a slideway 17 for the slide 1S, capable of slide movements in a line at right angles to the line of movement of the carriage upon the bed. Slide movements may beimparted to said slide upon the carriage in any known manner, as by a nut 19, fixed upon the slide and fitting the screw-spindle 20, capable of rotation Withoutlongitudinal movement upon the carriage. The slide is thus rendered capable of a universal adjustable movement in a single plane upon the bed. The slide is provided with a yoke-form upward projection 2l, adapted to receive a turret-supporting,r head 22, upon which is mounted a rotary turret 23. The turret-supporting head is oscillatory upon the horizontal shaft 24, mounted upon the yoke 2l, and means are provided for locking the head in selected positions of rotative adjustment, consisting of a bolt 25, inserted through one arm of the yoke 2l into the nut 26, fitting an annular undercut groove 27, formed in a side ofthe head concentric With its axis of oscillation. The turret 23 is mounted upon said head to rotate upon an axis at right angles to the shaft 24 or to the axis of oscillation ot' said head. The turret may be locked in selected positions of rotative adjustment upon the head by means of a bolt 28,inserted through a flange on said turret, over-hanging an annular plane surface on the head at right angles to the axis of the turret into a nut 29, ittingan annular undercut groove formed in said plane surface on the head concentrically With the axis of rotation of the turret. A plurality of such bolt-and-nnt connections may be employed, if desired, whereby the turret may be securely locked to the head. The turret supports a head-block 30, mounted thereupon to oscillate upon the shaft 3l at right angles to the axis of the turret, which shaft occupies a plane parallel with the shaft 2i and is adjustable in said plane at dierent angles to the shaft 24E by rotation of the turret. The head-block may be locked in selected positions of rotative adjustment by means of a bolt 40, inserted through an ear on the turret into a nut 4l, located in an undercut groove in a side of the head-block, forming an arc concentric with the axis ot' oscillation of the head-block.

The head-block 30 is adapted to support a work-holder, which may be of any known l have shown one style of work-holder in the form ot' a post or spindle 32, provided with a screwthreaded end 33, adapted to screw into a similarly-threaded socket in the head-block. This spindle is adapted to receive a bored article, as a milling-cutter 34, the bore of which is of somewhat greater diameter than said spindle. The outer end of the spindle is provided with a cone-follower 36, adapted to enter the bore in the held article and force the article againstastop,which may be an ollisetting portion of the headblock, and at the same time center the Work another portion of the cutter to the tool.

upon the spindle. The cone 36 is yieldingly held in engagement with the bored article by means of the nut 37, applied to the screwthreaded outer end of the spindle, and the spring 38, inserted between said nut and cone. The article is thus held centered upon the spindle, While left free to be rotated thereupon. The Work-holder is thus adjustable upon two axes of oscillation or rotation at right angles to each other and is also adjustable upon three axes of oscillation or rotation, two of which (represent-ed by the shafts 24; and 3l) are at right angles to the third, (represented by the axis of the turret.) A very wide range of rotative adjustment is thus given to the work-holder thus mounted, in addition to which the Work-holder has a universal adjustment in straight lines by reason of the vertical movement of the bed, slide movement of the carriage in one direction at right angles to the movement of the bed, and slide movement of the slide at right angles to both the slide movement of the carriage and the vertical movement of the bed. It is thus possible to present the Work to the tool in almost any conceivable position and is also possible to impart to the work such movement of reciprocation and oscillation as will cause portions of the article being dressed to traverse the .tool in straight or curved lines in Various directions.

In dressing the teeth of a milling-cutter it is necessary to secure the best results that the successive teeth should be presented in precisely the same manner to the emery-wheel or dressing-tool. To facilitate such a result, I provide a catch-bolt mounted upon a suitable support and adapted to interlock With the successive teeth of the supported article when rotated. I have shown the catch-bolt 45, controlled by spring 46, mounted in the housing 47, adjustable longitudinally upon the arm 48 and adapted to be locked in adjusted positions upon said arm by means of the bolt 49, the arm 48 being mounted upon the Work-holder preferably by means of an adjustable hinge connection, as shown at 50, capable of being locked in adjusted position by means of the bolt 5l. The catch-bolt can thus be adjusted in position to interlock With a tooth of the milling-cutter held by the workholder and forms a positive stop for the face of the tooth, and when so adjusted will by engagement of its beveled end with the beveled backs of the several teeth yield to permit each tooth to slip past the bolt as the cutter is rotated by the hand of the operator to present the teeth successively to the tool, and when a tooth has thus slipped past the bolt the latter is immediately projected by its spring into position to form a posit-ive stop, against which the face of said tooth can be held during the presentation of a tooth in By means of the hinged connection 50 the catchbolt can be adjusted to engage a tooth on the cutter diametrically opposite the tooth being IOO IIO

ISO

acted upon by the tool or at any intermediate angle thereto, as may be most convenient for the operator. i A

The work-holder above described is more particularly adapted for holding disk cutters. I have shown in Figs. 9 to l2 a form of workholder more particularly adapted for ball cutters or cutters havingv Yspherical surfaces. This style of work-holder comprises an offset frame mounted upon the head-block 30 in place of the post or spindle 32, said frame being preferably adapted to rotate upon said head-block on an axis at right angles to the axis of oscillation of the head-block, and having an overhanging work-holding arm preferably shiftable transversely of the axis of rotation of the frame. This frame comprises a pair of parallel members 55 and 56, with adinstable sliding connections therebetween located at one side of the axis of rotation of the frame. The member V55 is adapted to be secured to the head-block by means of a screW 57 inserted through a plain aperture in one end thereof into the screw-threaded socket in the head-block, the outerend of said member being of spindle form and provided with a 4of the member 56 projects beyond the sleeves 6l to form an overhanging arm adapted to serveasawork-holder. Bylooseningthebolts 62 the member 56 may be reciprocated through the sleeves 61 to vary the overhang of such arm to accom modate the device to work of dierent styles. The arm can thus be made to so overhang the axis of rotation of the frame, which is the axis of the screw or bolt 57, that when an article is held upon said arm the axis of rotation of the frame and held article will pass through said article. By loosening the bolts 63 the members 56 and 60 can be rocked upon the member 55 to shift the overhanging workholding arm transversely of the axis of rotation of the frame. When said arm has been shifted to one side or the other of said axis, rotary movements of the frame will impart to the work held by said arm a rotary movement upon an axis located within and to one side of the center of the held article." A'- The work-holder shown in Figs. 9 and l0V comprises a cone 65, fixed upon the Aoverhanging arm of member 56 and the movable cone 66, fixed upon the inner end ofspindle 67, reciprocatory through the member 56,

"and hold the article securely in position.

As a means for accurately determining the radius of curvature imparted to the surface dressed or ground by the emery-wheel I have shown an arm 70, provided with a graduated scale and pivotally mounted upon the ,stud 71,74

projecting from the upper end of the screwbolt 57 and in axial line therewith, whereby said arm is adapted to swing upon the same axis as the work-holding frame. The arm is provided with a sliding split index-sleeve 72, adapted to be clamped thereupon in ad justed positions by means of the screw73 and provided with a split bearing 74, adapted to receive the index-rod 75, having an offset end 76. The scale is so arranged thaty the reading of the position of the index-sleeve correctlyindicates the distance of the offset end 76 of the index-rod from the axis of rotation of the work-holding frame. In making read-y for the grinding operation the sleeve 72 is set for the desired radius of curvature, and the work-holding `member 56 is moved through IOO the sleeves 6l until the lportion of the held article to be ground is caused to engage the offset end 76 of the index-rod. The index- Y rod, index-sleeve, and arm 70 maybe removed during the grinding operation when desired. g

In grinding certain. kinds of work it is dej sirable to have the emery-wheel quickly traverse the planesurface of the article under treatment. imparting to the emery-Wheel reciprocating movements on straight lines, as well as rotary movements. The wheel is fixed upon the inner end of a spindle 80,1 capable offlon` gitudinal slide movements through a sleeve 81, rotatively supported in dividedv bearings 82 on the upper end of the frame of the machine, to which sleeve rotary movements are imparted by a belt (not shown) through the pulley 84, fixed upon said sleeve by a pin or screw 85, which also passes through and fits an elongated slot V86 in the tool-spindle 80, whereby the pulley, sleeve, and spindle are connected to rotate in unison, while reciprocating movements of the spindle within the I therefore provide means for IIO IZO

sleeve are permitted. The sleeve 8l is provided with a biconical bearing flange 86, adapted to fit a corresponding groovein a div-,

from longitudinal movement, and .wear upon .said bearing-flangecan be taken up by tight- .ening the bolts 87, vwherebythe parts of lthe Vvided bearing 82, whereby saidsleeve is held i divided bearing are hield togetherand clampedY upon saidsleeve. The outer end of the` spin-- dle 8O is provided with a radial aperture, within which is inserted an end. of the spindle 89, upon which the spindle is adapted to freely turn, said spindles being rotatively connected. together by means of a pin 90, inserted through the spindle 80 and occupying a peripheral groove 91 in the spindle 89. An oil-passage 92 permits the admission of a lubricant between the engaging surfaces of said spindles. The spindle 89 is fixed upon an arm 93 reciprocatory in a slide-bearing 94 and is adapted to be operated by a lever-handle 95 in the usual manner to impart slide movements to the tool-spindle. The slide-bearing 94 is vertically adjustable upon a post 96, erected from the arm 97, fixed upon the frame of the machine. The slide-bearing 94 may be locked in selected positions of vertical adjustment by means of the set-screw 98, such adjustment permitting the perfect alinement of the axes of the spindles 80 and 89 regardless of wear upon the bearing-surface of the sleeve 81, which would tend to cause the axis of the `spindle 80 to occupy a lower plane. The sleeve S0 is provided exteriorly of the bearing 82 with a Harige 100, and a packingring 101 is inserted and held between said flange and the adjacent bearing to prevent the entry of grit from the emery-wheel within the bearing for the sleeve 81. The pulley 84: serves the function of a like flange on the other side of the bearing, the packing-ring 102 being held between said pulley and the adjacent bearing.

The bearings for the grinding-tool are preferably mounted on a yoke 104;, supported upon the frame of the machine and adapted to rotate thereupon upon a vertical axis, as upon the pivot-bolt 105, in the usual manner.

What I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the class described, the combination with a tool; of a work-holder oscillatory upon three axes two of which occupy parallel planes at right angles to the third, one of said two being adjustable in its plane at different angles to the other.

2. In a machine of the class described, the combination with a tool; and a bed adjacent thereto; of a slide universally adjustable in a single plane upon said bed; and a workholder mounted upon said slide and oscillatory thereupon on two axes at right angles to each other.

3'. In a machine of the class described, the combination with a tool; and a bed adjacent thereto; of a slide universally adjustable in a single plane upon said bed; and a workholder mounted upon said slide and oscillatory thereupon on three axes two of which occupy parallel planes at right angles to the third.

4f. In a machine of the class described, the combination with a tool; and a bed adjacent thereto; of a slide universally adjustable in a single plane upon said bed; and. a work- -holder mounted upon said slide and oscillatory thereupon on three axes two of which occupy parallel planes at right angles to the third, one of said two being adjustable in its plane at different angles to the third.

5. In a machine of the class described, the combination with a tool; of a bed adjacent thereto; a slide universally adjustable in a single plane upon said bed; a turret; a turretsupporting head mounted upon said slide to oscillate upon an axis at right angles to the axis of the turret; and awork-holder mounted on said turret and oscillatory thereupon on an axis at right angles to the axis of the turret.

6. In a machine of the class described, the combination with a tool; a bed; and means for adjustably moving said bed toward and from said tool; of a workholder mounted upon said 'bed and oscillatory thereupon on two axes at right angles to each other.

A7. In a machine of the class described, the combination with a tool; a bed 5 and means for adjustably moving said bed toward and from said tool; of a work-holder mounted upon said bed and oscillatory thereupon on two axes occupying parallel planes one of which axes is adjustable in its plane at different angles relatively to the other.

8. In a machine of the class described, the combination with a tool; abed; and means for adjustably moving said bed toward and from said tool; of a work-holder mounted upon said bed and oscillatory thereupon on three axes, two of which occupy parallel planes at right angles to the third.

9. In a machine ot' the class described, the combination with a tool; a bed; and means for adjustably moving said bed toward and from said tool; of a work-holder mounted upon said bed and oscillatory thereupon on three axes, two of which occupy parallel planes at right angles to the third, one of said two being adjustable in its plane at dierent angles to the other.

10. In a machine of the class described, the combination with a tool; a bed; and means for adjustably moving the bed toward and from the tool; of a slide universally adjustable in a single plane upon said bed; and a workholder mounted upon said slide and oscillatory thereupon on two axes at right angles to each other.

11. In a machine of the class described, the combination with a tool; a bed; and means for adjustably moving the bed toward and from the tool; of a slide universally adjustable in a single plane upon said bed; and a workholder mounted upon said slide and oscillatory thereupon on two axes occupying parallel planes one of which axes is adjustable in its plane at different angles relatively to the other.

12. In a machine of the class described, the combination with atool; a bed; and means for adjustably moving the bed toward and from the tool; of a slide universally adjustable in a single plane upon said bed; and a work- IOO IIO

IZO

P727,981 j t3 holder mounted upon said slide and oscilla-V- tory thereupon on three axes, two of which occupy parallel planes at right angles to the third. l v l 13. I n a machine of the class described, the combination with a tool; a bed; and means for adjustably moving the bed'toward and from the tool; of a slide universally adjustable in a single plane upon saidbed; and a Workholderl mounted upon said slide and oscillatory thereupon on three axes, tvvo of which occupy parallelgplanes at right angles to the third, one of said two being adjustable in its plane at different angles to the other.

14. In a machine of the class described, the combination Witha tool; a bed; and means for adjustably moving the bed toward and from the tool; of a slide universally adjustable in a single plane upon said bed; a turret; aturret-supporting head mounted upon said slide to oscillate upon an axis at right angles to the axis of the turret; and a work-holder mounted on said turret and oscillatory thereupon on an axis at right angles to the axis ofthe turret.

15. In a machine of the class described, the combination With a tool; and abed adjacent thereto; -of a turret mounted upon said bed; a head-block mounted upon said turret to oscillate thereupon on an axisat right angles to the axis of the turret; an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block, and having an overhanging Work-holding arm. v

1G. In a machine of the class described, the combination with a tool; a bed adjacent thereto; and a slide adjustablyv mounted on said bed; of a turret mounted upon said slide; a head-block mounted upon said turret to oscillate thereuponl on an axisat right angles to the axis of the turret; and an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block, and having an overhanging Work-holding arm.

. 17. In a machine of the class described, the combination With a tool; and a bed adjacent thereto; of a turret; a turret-'supporting head mounted upon said bed to oscillate thereupon on an axis at :right angles to the axis ot' the turret; a head-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; and an oset frame mountedl upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block, and having an overhangingWork-holding arm.

18. Ina machine of the class described, the combination with atool; abcd adjacent thereto; and a slide adj ustably mounted upon said bed; of a turret; a turret-supporting head mounted upon said slide to oscillate thereupon on an axis at right angles to the axis of the turret; ahead-block mounted upon said turret to oscillateV thereupon on an axis at right angles tothe axis of the turret; andan offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis ot' oscillation of said head-block, and having anoverhanging work-holding'arm.

19. In a machine'of the class described, the combination With atool; a bed adjacent thereto; and a slide universally adjustable in asinl gle plane upon said bed; of a turret; a turretsupporting head mounted upon said slide to oscillate thereupon on an axis at right angles to the axis of the turret; a head-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; and an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axisof oscillation of said Y head-block, and having an overhangingworkholding arm. l

20. In a machine of the class described, the combination with a tool; a bed; and means for adjustably moving said bed toward and from said tool; of a turret; a turret-supporting head mounted upon said bed to oscillate thereupon on an axis at right angles to the axis of the turret; a head block mounted upon said turret; and an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block, and having an overhanging Work-holding arm.

21. In a machine of the class described,the combination with a tool; a bed; and means for adjustably moving said bed toward and from the tool; of a slide adjustablyv mounted upon said bed; a turret; a turret-supporting head` mounted upon said slide to oscillate thereupon on an axis at right angles to the axis of the turret; a head-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; and an odset frame mounted upon said head-block and having an overhanging Work-holding arm. i

22. In a machine of the class described, the combination with a tool; abed; and means for adjustably moving said bed toward and from the tool; of a slide universally adjustable in a single plane upon said bed; of a turret; a turret-supporting head mounted upon said slide to oscillate thereupon on anaxis at right angles to the axis of the turret; a headblock mounted upon said slide to oscillate thereupon on an axis at rig-ht angles to the axis of the turret; and an oiEset frame mounted upon said head-block and having an overhanging Work-holding arm.

23. In a machine of the classdescribed, the combination with a tool; and a bed adjacent thereto; of a turret mounted upon saidrbed; a head-block mounted upon said turret to oscillate thereupon on an axis at rightangles to the axis of the turret; and an offset frame 4,mounted upon said head-block to rotate thereupon on an axis at rightfangles to the axis of oscillation of said head-block and having an overhanging Work-holding arm shiftn able transversely of the axis of rotation of said frame.

IOS

24. In a machine ofthe class described, the combination with a tool; and a bed adjacent thereto; of an ott'set frame mounted upon said bed to rotate thereupon and having a Workholding overhanging arm shiftable transversely of the axis of rotation of said frame.

25. In a machine of the class described, the combination with a tool; and a bed adjacent thereto; of a head-block mounted on said bed to oscillate thereupon; and an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block and having an overhanging Work holding arm shittable transversely of the axis of rotation of said frame.

26. In a machine of the class described, the combination With a tool; and a bed adjacent thereto; of a turret; a turret-supporting head mounted upon said bed to oscillate thereupon on an axis at right angles to the axis ot the turret; ahead-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; and an offset frame mounted upon said head-block to rotate thereupon on an axis at rightangles to the axis of oscillation of said headblocl and having an overhanging work-holding arm shiftable transversely of the axis ot rotation ot said frame.

27. In a machine of the class described, the combination with a tool; a bed adjacent thereto; and a slide adj ustably mounted upon said bed; of a turret; a turret-supporting head mounted upon said slide to oscillate thereupon on an axis at right angles to the axis of the turret; a head-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; and an odset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block and having an overhanging Work-holding arm shiftable transversely of the axis of rotation of said frame.

28. In a machine of the class described, the combination With a tool; a bed adjacent thereto; and a slide universally adjustable in a single plane upon said bed; of a turret; a turretsupporting head mounted upon said slide to oscillate thereupon on an axis at right angles to the axis of the turret; a head-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; and an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block and having an overhanging Workholding arm shiftable transversely of the axis of rotation of said frame.

29. In a machine of the class described, the combination with a tool; a bed; and means for adjustably moving said bed toward and from said tool; of a turret; a turret-supporting head mounted upon said bed to oscillate thereupon on anaxis at right angles to the axisof the turret; a head-block mounted upon said turret; and an offset frame mounted upon said head-block to rotate thereupon on an axis at right angles to the axis of oscillation of said head-block, and having an overhanging workholding arm shit'table transversely of the axis of rotation of said frame.

30. In a machine otl the class described, the combination with a tool; a bed; and means for adjustably moving said bed toward and from the tool; of a slide adjustably mounted upon said bed; a turret; a turret-supporting head mounted upon said slide to oscillate thereupon on an axis at right angles to the axis of the turret; and au oi'set frame mounted upon said head-block and having an overhanging Work-holding arm shiftable transversely of the axis of rotation of said trame.

3l. In a machine ofthe class described, the combination with a tool; a bed; and means for adjustably moving said bed toward and from the tool; ot' a slide universally adjustable in a single plane upon said bed; a turret; a turret-supporting head mounted upon said slide to oscillate thereupon on an axis at right angles to the axis ot' the turret; a headblock mounted upon said slide to oscillate thereupon on an axis at right angles to the axis ofthe turret; and an ott'set frame mounted upon said head-block and having an overhanging work-holding arm shiftable transversely of the axis of rotation of said frame.

32. In a machine of the class described, the combination With a tool; and a bed adjacent thereto; of a turret mounted upon said bed; a head-block mounted upon said turret to oscillate thereupon on an axis at right angles to the axis of the turret; means for locking certain of said members in selected positions of rotative adjustment; and an oitset frame mounted upon said head-block and having an overhanging Work holding arm shiftable transversely of the axis of rotation of said frame.

In a machine of the class described, a holder for bored articles comprising in combination a spindle mounted upon a suitable support and adapted to loosely occupy the base of the held article; a stop engageable with said article on oneside; a cone on said spindle insertible in the bore of said article on its other side; and means for producing a relative movement between said cone and stop, substantially as described.

34. In a machine of the class described, a holder for bored articles, comprising in combination a spindle mounted upon a suitable support; a split sleeve loosely inclosing said spindle and insertible in the bore of the held article; a pair of cones insertible Within the opposite ends of said split sleeve; and means for moving one of said cones toward the other to expand said split sleeve, substantially as described.

35. In a machine of the class described, the combination with a Work-support; of a tool; a tool-supporting spindle having a biconical flange; a divided bearing for said spindle ICO IIO

provided with a groove'adapted to fit said biconical ange; means for clamping the flanged spindle between the bearing members; and means for rotating said spindle, substantially as described.

36. In a machine ot' the class described, the combination with a work-support; of a tool; a sleeve having an external biconical flange; a divided bearing for said sleeve provided with a grooveadapted to fit said flan ge; means for clamping the flanged sleeve between the bearing members; means for rotating said sleeve; a tool-supporting spindle reciprocatory longitudinally within said sleeve and connected to rotate therewith; and means for reciprocating said spindle, substantially as described.

37. In a machine 0f' the class described, the combination with a work-support; of an abrasive tool; a bearing; a tool-supporting spindle rotatively mounted in said bearing and having a biconical hearing-flange fitting a corresponding groove therein; and a flange located eXteriorly of said bearing; means for rotating said spindle; and a packing-ring held between said exterior flange and said bearing, substantially as described.

38. In a machine of the class described, the combination with a work-support; of a tool; a divided bearing; a sleeve having two extei-nal flanges, one located exteriorlyof -said bearing and the other biconical in form and fitting a corresponding groove therein; a packing-ring held between said outer flange and bearing; means for clamping the flanged sleeve between the bearing members; means for rotating Vsaid sleeve; a tool-supporting Yspindle reciprocatory longitudinally Within said sleeve and connected to rotate therewith; and means for reciprocating said spindle, substantially as described.

39. In a machine of the class described, the

combination with a work-support; of a tool; a sleeve having an external biconical flange; a divided bearing for said sleeve provided with a groove adapted to fit said flange means for clamping the flanged sleeve between the bearing members; means for rotating said sleeve; a tool-supporting spindle reciprocatory Vlongitudinally within said sleeve and connected togrotate therewith; means for reciprocating said spindle; and a vertically-adjustable slidebearing for the outer end of said spindle; substantially as described.

In testimony whereof 'I have hereunto set my hand this 18th day of December, 1902. WILLIAM F. LOMASNEY. Witnesses:

RENssELAEE J. COOPER, JAMES C. COOPER. 

